/**
 * +----------------------------------------------------------------------
 * | 「e家宜业」 —— 助力物业服务升级，用心服务万千业主
 * +----------------------------------------------------------------------
 * | Copyright (c) 2020~2021 https://www.chowa.com All rights reserved.
 * +----------------------------------------------------------------------
 * | Licensed 未经许可不能去掉「e家宜业」和「卓瓦科技」相关版权
 * +----------------------------------------------------------------------
 * | Author: jixuecong@chowa.cn
 * +----------------------------------------------------------------------
 */

import { CwComponent } from '../common/component';
import { touch } from '../mixins/touch';
import { canIUseModel } from '../common/version';
import { getRect } from '../common/utils';
CwComponent({
    mixins: [touch],
    props: {
        disabled: Boolean,
        useButtonSlot: Boolean,
        activeColor: String,
        inactiveColor: String,
        max: {
            type: Number,
            value: 100
        },
        min: {
            type: Number,
            value: 0
        },
        step: {
            type: Number,
            value: 1
        },
        value: {
            type: Number,
            value: 0,
            observer(val) {
                if (val !== this.value) {
                    this.updateValue(val);
                }
            }
        },
        barHeight: {
            type: null,
            value: 2
        }
    },
    created() {
        this.updateValue(this.data.value);
    },
    methods: {
        onTouchStart(event) {
            if (this.data.disabled) return;
            this.touchStart(event);
            this.startValue = this.format(this.value);
            this.dragStatus = 'start';
        },
        onTouchMove(event) {
            if (this.data.disabled) return;
            if (this.dragStatus === 'start') {
                this.$emit('drag-start');
            }
            this.touchMove(event);
            this.dragStatus = 'draging';
            getRect(this, '.cw-slider').then(rect => {
                const diff = (this.deltaX / rect.width) * this.getRange();
                this.newValue = this.startValue + diff;
                this.updateValue(this.newValue, false, true);
            });
        },
        onTouchEnd() {
            if (this.data.disabled) return;
            if (this.dragStatus === 'draging') {
                this.updateValue(this.newValue, true);
                this.$emit('drag-end');
            }
        },
        onClick(event) {
            if (this.data.disabled) return;
            const { min } = this.data;
            getRect(this, '.cw-slider').then(rect => {
                const value = ((event.detail.x - rect.left) / rect.width) * this.getRange() + min;
                this.updateValue(value, true);
            });
        },
        updateValue(value, end, drag) {
            value = this.format(value);
            const { min } = this.data;
            const width = `${((value - min) * 100) / this.getRange()}%`;
            this.value = value;
            this.setData({
                barStyle: `
          width: ${width};
          ${drag ? 'transition: none;' : ''}
        `
            });
            if (drag) {
                this.$emit('drag', { value });
            }
            if (end) {
                this.$emit('change', value);
            }
            if ((drag || end) && canIUseModel()) {
                this.setData({ value });
            }
        },
        getRange() {
            const { max, min } = this.data;
            return max - min;
        },
        format(value) {
            const { max, min, step } = this.data;
            return Math.round(Math.max(min, Math.min(value, max)) / step) * step;
        }
    }
});
